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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.8;

contract SimpleStorage {
    uint256 favoriteNumber;

    mapping(string => uint256) public nameToFavoriteNumber;

    struct People {
        uint256 favoriteNumber;

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// SPDX-License-Identifier: MIT

pragma solidity 0.8.0;

contract Example3 {

    uint256 count;
    uint256 public time;

    constructor(){

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// SPDX-License-Identifier: GPL-3.0

pragma solidity 0.8.0;

contract Bank {
    address public owner;
    mapping(address => uint256) depositor;
    address[] public depositors;

    constructor() {

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// SPDX-License-Identifier:MIT

pragma solidity 0.8.0;

contract Tuple {
    function getValues() public pure returns (int, bool) {
        return (49, true);
    }

    function get() public pure returns (int) {

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// SPDX-License-Identifier: GPL-3.0

pragma solidity ^0.8.0;

contract Vault {
    // a contract where the owner create grant for a beneficiary;
    //allows beneficiary to withdraw only when time elapse
    //allows owner to withdraw before time elapse
    //get information of a beneficiary
    //amount of ethers in the smart contract

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//SPDX-License-Identifier: GPL-3.0;

pragma solidity 0.8.7;

contract Energy {
    //have total supply
    //transferrable
    //name
    //symbol
    //decimal

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// SPDX-License-Identifier: GPL-3.0

pragma solidity 0.8.4;

import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/ERC20.sol";

contract Erc20Token is ERC20("fire on", "FIO") {
    constructor() {
        _mint(address(this), 10000e18);
    }

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package main

import (
	"crypto/sha256"
	"fmt"
)

func main() {
	hash := sha256.New()
	hash.Write([]byte("Hello, World!"))

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package main

import (
	"fmt"
	"golang.org/x/crypto/sha3"
)

func main() {
	data := "Hello, Ethereum!"

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package main

import (
	"crypto/ecdsa"
	"fmt"
	"log"

	"github.com/ethereum/go-ethereum/crypto"
	"github.com/ethereum/go-ethereum/common"
)